ANDERSON, J. M.; VASIL’EV, A. Lower Schwarz-Pick estimates and angular derivatives. Annales Fennici Mathematici, [S. l.], v. 33, n. 1, p. 101–110, 2008. Disponível em: https://afm.journal.fi/article/view/135219. Acesso em: 10 apr. 2025.